Carburetor Base Anti-Blocking Component for Pulsation Channel
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Solution Overview
Problem
Existing carburetors in small-size engines, such as those in hand-held mowers and backpack-type lawn and garden machines, face issues with stable operation due to the liquefaction of oil and gas in the air inlet channel, which leads to blockages in the pulsation hole channel, affecting engine cooling and performance.
Innovation Solution
A carburetor base with an axial through hole and pulsation hole channel, featuring an anti-blocking component that includes an air inlet channel communicating with the pulsation hole channel, where the anti-blocking component is a tubular article with an annular recess and adjustable through hole positioned above the air inlet channel to prevent blockages by condensed fuel oil.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the pulsation hole channel is directly connected to the air inlet channel on the carburetor base, then the structure is simple and easy to manufacture, but the condensed fuel oil easily blocks the pulsation hole channel, affecting carburetor stability and engine cooling
Solution Approach 1:
The pulsation hole channel is segmented into two separate channels: a first pulsation hole channel connected to the air inlet channel and a second pulsation hole channel connected to the pulsation hole. This segmentation prevents condensed fuel oil from blocking the second channel while maintaining the functionality of the first channel for introducing negative pressure, thus resolving the contradiction between structural simplicity and operational reliability
Solution Approach 2:
The patent introduces an intermediary structure (the first pulsation hole channel) that acts as a separate pathway for negative pressure transmission. This intermediary channel is positioned and designed to avoid contact with condensed fuel oil, while still fulfilling the function of connecting the air inlet channel to the pulsation hole, thereby maintaining reliability without overly complicating the structure
2Device complexity
If the air inlet channel is used for both air intake and pulsation pressure transmission, then the device complexity is reduced, but the condensed fuel oil blocks the channel, preventing proper engine cooling
Solution Approach 1:
The single air inlet channel is segmented into two distinct functional channels: the first pulsation hole channel dedicated to negative pressure transmission and the second pulsation hole channel for pulsation hole connection. This segmentation ensures that condensed fuel oil blocking one channel does not affect the other, preserving engine cooling efficiency while maintaining relatively simple device complexity
Solution Approach 2:
Different sections of the carburetor base are assigned different functional qualities: the first pulsation hole channel is designed with specific positioning and routing to avoid fuel oil condensation zones, while the second channel is optimized for direct pulsation hole connection. This local differentiation of channel functions ensures proper cooling while avoiding the need for completely complex multi-channel configurations
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively prevents blockages in the pulsation hole channel, ensuring smooth vaporization of fuel and stable engine operation by allowing fuel to pass through the air inlet channel without condensing and blocking the pulsation hole channel, thereby enhancing the carburetor's running efficiency and stability.
Implementation Method 1
liquid oil enters the cylinder after being vapourized by the carburetor
Implementation Method 2
negative pressure generated due to reciprocating motion of a piston being transferred into the carburetor through the pulsation hole
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A carburetor base of an engine is provided with an axial through hole (54), a pulsation hole channel (56) and an anti-blocking component (60). The anti-blocking component (60) is mounted inside the axial through hole (54) and is provided with an air inlet channel (53), and the air inlet channel (53) is communicated with the pulsation hole channel, in order to avoid the blocking of condensed fuel inside the pulsation hole channel (56).